[mythtv-users] Maximum length of cables for USB<>Serial DirecTV control?

[bhaskins at chartermi.net]

---- Kevin Ross <kevin at familyross.net> wrote: 
> Scott Harris wrote:
> > Howdy all,
> >     I've got three DirecTV STBs, all working great either via
> > the built in mini RJ-22 or the USB<>Serial connections.  They are
> > all connected with fairly short cable lengths, < 2-3 feet.  I'm
> > trying to un-tether the 3 STBs from the mythtv backend system,
> > mainly to seperate them due to heat building.
> >
> > I've read the various specs for USB cable lengths, and it seem that
> > going the 25-30 feet I need to go shouldn't be an issue, so long as
> > I'm willing to get better grade cable or add some sort of powered
> > repeater hub in the middle.
> >
> > Does anyone have any real world proof that this distance would work?
> > Is it even feasible with the type of "USB" connections the STBs have?
> > Is there possibly a better, wireless solution?  I've never been too
> > keen on the wireless stuff, as it would mean some type of non direct
> > wired connection, which would reduce reliability.
> >
> > Thanks for any help.
> >
> > Scott
> 
> I don't know about USB, but for serial, you can go up to about 50 feet 
> with no problems.  If you need to go longer distances, you can get 
> RS-232 to RS-422 adapters, which would allow for cable runs close to a 
> mile (if memory serves).
How about:
USB to RS-422<>RS-422 to USB ?
Or even USB to fiber<>fiber to USB.
422 is much better that 232 on anything  more than three feet or so.
There are converters available for either/both.
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